President Donald Trump on Monday raised the possibility of withdrawing his nomination of Republican Rep. Tom Marino to be the nation's drug czar following reports that the lawmaker played a key role in passing a bill weakening federal authority to stop companies from distributing opioids.

For U.S. presidents, meeting the families of military personnel killed in war is about as wrenching as the presidency gets. President Donald Trump's suggestion Monday that his predecessors fell short in that duty brought a visceral reaction from those who witnessed those grieving encounters.